When you're up in the mountains around the camp fire and the person you have a crush on is over grinding on someone else's special place. Instead of saying "screw it" and moving on, you sit alone on a log staring into the fire, reflecting on everything in your life that sucks, whether it's relevant or not. Eventually someone will come over and ask you if you are OK, and give you some random advice that you will really appreciate and remember forever.

The safeguarding of Earth and other worlds from biological cross-contamination (i.e. billionaires with too much time on their hands).

Also known as “planetary protection.” Planetary protection / quarantine “reflects both the unknown nature of the space environment and the desire of the scientific community to preserve the pristine nature of celestial bodies until they can be studied in detail.”

There are two types of interplanetary contamination. Forward contamination is the transfer of viable organisms from Earth to another celestial body. Back contamination is the transfer of extraterrestrial organisms, if such exist, back to the Earth's biosphere.